Slide-valve.



J. P. MORAN.

SLIDE VALVE.

APPLIOATION FILE D'MAY 27, 1911.

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SLIDE VALVE.

APPLIOATLON FILED MAY 27, 1911..

Patented May'28,1912.

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UNITED sTAT s PATENT OFFICE.

JOHN IE. MORAN, or PITTSBURG, KANSAS, ASSIGNOR or ONE-HALF no JOHN P. RYDER, or KANsAs CITY, MIssoURI.

SLIDE-VALVE.

Specification of Letters Patent.

,, Patented May 28,191 2.

Application filed May' 27, 1911. Serial No. 629,780.

T all whom it may concern:

' acting agalnst said parts, to actuate one of them outwardly, to bear against the pressure plate, or steam chest cover.

A further object of the invention is .to provide a slide valve, consisting of telescoped parts, a packing being interposed between said parts, and novel and improved means being provided for expanding the said packing. I

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter de scribed and claimed, it being understood that changes in the precise embodiment of invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of theinvention.

In the accompanying drawings,Figure 1 shows the invention in sectional side elevation; Fig. 2 is a sectional end elevation; Fig. 3 is a section upon the line A-B of Fig. 1; Fig. 4: is asectional top plan; and Fig. 5 is a sectional end elevation showing a modified form of the invention.

The invention consists of telescoped inner and outer parts, the outer part, in that form of the invention shown in Fig. 1, comprising the body 1 of the valve, within which fits the sleeve 2, the sleeve 2 having a flange,

3, adapted to extend outwardly across the edge of the body 1. The flange 3 is peripherally provided with a friction head 4 which bears against the pressure plate or steam chest cover (not shown).

In the edge of the body 1, and in the adjacent face of the flange 3 of the sleeve 2, elongated seats 5 are formed, in which are seated arcuate springs 6. As will be readily understood, these springs 6 serve to press the sleeve 2 outwardly, to engage with the steam chest cover. In the outer face of the sleeve 2 there is a circumscribing,=superficial groove 7, adapted to receive a packing 8,

preferably formed in four parts, and extended along the four sides of the sleeve 2, arcuate. springs 9 being seated in the grooves 7 to the rear of the packing parts 8, whereby the packing is forced outwardly, for engagement with the inner face of the body 1.

As seen most clearly in Fig. 3, the constituent parts of the packing 8, are beveled, adjacent the corners of the structure, as shown at 10, and between these beveled end faces of the packing parts, is entered, at each corner of the structure, a wedge 11, having a reduced shank or stem, extended toward the center of the sleeve, the shank being denoted by the numeral 12. In the outer face of the sleeve 2, adjacent each corner thereof, is fashioned a primary recess 16, communicating with a secondary recess 14, of considerably less diameterthan the recess 16, the recess 14: extending rearwardly into a fillet 15, formed in the inner portion of the sleeve 2, at the corner thereof. A

spring, preferably of helical construction,

As will be readily understood, the springs 9 serve to thrust the packing 8 outwardly, against the valve body 1, springs 17 serving to enter the edge 11 between the beveled faces 10 of the parts of the packing 8, thereby expanding the packing, and affording a steam tight joint. 7

In Fig. 5 of the drawings, a slightly modified form of the invention is shown. In this form of the invention, the structure hereinbefore described, is adapted for use in connection with an old valve body, altered and modified to carry out the invention. This valve body, constituting the inner member of the valve structure, is denoted by, the numeral 18, and around the valve body 18 fits the sleeve 19, the sleeve 19 constituting the outer of thetelescoped inembers of the" fore, to receive the springs 23, which serve to thrust the sleeve 19 outwardly. It will be understood, without specific or further description, that the spring-actuated, wedge structure, shown in Fig. 3, for separating the constituent parts of the packing, is employed in connection with that form of the be found to be exceedingly durable, upon account of the long, equal bearings afiorded, there being practically no wear upon the packing strips, since they are placed in such a manner that there is no direct steam pressure upon them. ployed with or without a top, on new valves, making a covered, or a skeleton valve, as may be desired.

Having thus described the invention, what is claimed is 1. A slide valve comprising telesooped inner and outer members, the inner member The sleeves may be em-' being provided with a superficial groove; a packing located in the groove and comprising separate parts; a wedge entered between said parts and having a shank slidable in the inner member; and a spring surrounding the shank and bearing at one end against the wedge, and at the other end against the inner member.

2. A slide valve comprising telescoped inner and outer members, the inner member being provided with a superficial groove; a packing located in the groove, and comprising separate parts; the inner member being provided at one corner with primary and secondary recesses of different diameters; a wedge entered bet-ween the parts of the packing, and having a shank adapted to enter the secondary recess; and a spring bearing at one end against the wedge, and at the other end against the base of the primary recess.

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

JOHN F. MORAN.

' Witnesses:

FLOYD BEE, P. RYDER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

